Arrogance is a killer, and wearing ambition on one's sleeve can have the same effect. There is a fine line between arrogance and self-confidence. Legitimate self-confidence is a winner. The true test of self-confidence is the courage to be open—to welcome change and new ideas regardless of their source. Self-confidant people aren't afraid to have their views challenged. They relish the intellectual combat that enriches ideas.

John Francis "Jack" Welch, Jr. (born November 19, 1935) was Chairman and CEO of General Electric between 1981 and 2001. During his tenure, GE increased its market capitalization by over $400 billion. He remains a highly-regarded figure in business circles due to his innovative management strategies and leadership style.